Amplifier



FIG. 1 is a perspective view of a first embodiment of an amplifier showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a perspective view of a second embodiment of an amplifier showing my new design; and,

FIG. 9 is a front elevational view of the embodiment of FIG. 8, the rest of views of the embodiment of FIG. 8 is the same as these of the embodiment of FIG. 1. 

The ornamental design for an amplifier, as shown and described. 